Secrets Behind Justin Bieber's Oscars Row with Usher Exposed: 'Baby' Singer Fuming at Lack of 'Protection' While Mentor Feels 'Underappreciated'

Bieber, 32, attended the bash with wife Hailey, 29, alongside a group of pals and was not expecting an altercation with Usher. But Bieber's resentment towards the Burn singer, who he feels failed to protect him during his fledgling years in music, came to the surface after Usher approached him, filled with his own frustration about being sidelined by the former teen star. Insiders claim Usher reportedly feels Bieber "under-appreciates" everything he's done for him, which has made the recent snubs even harder to take.